Dental chair back



FIG. 1 is a perspective view of a dental chair back incorporating the design of my new invention, with portions of the base and seat of a chair with which the back is associated shown for purposes of orientation in phantom outline;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a side view thereof, the other side being a mirror image thereof;

FIG. 4 is a back view thereof;

FIG. 5 is a top view thereof; and,

FIG. 6 is a bottom view thereof.

The features of the dental chair back shown in phantom lines are not claimed. 

The ornamental design for a dental chair back, as shown and described. 